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llvm / llvm-project / llvm / 315ff80c737a5e08909708ec52e5c7150ac90266 / . / test / Transforms / GVNHoist / hoist.ll
blob: caf49bf8989f5ddd70cc026cf9f371d9dbe59392 [file] [log] [blame]
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -opaque-pointers=0 -passes=gvn-hoist -S < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@GlobalVar = internal global float 1.000000e+00
; Check that all scalar expressions are hoisted.
define float @scalarsHoisting(float %d, float %min, float %max, float %a) {
; CHECK-LABEL: @scalarsHoisting(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[DIV:%.*]] = fdiv float 1.000000e+00, [[D:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = fcmp oge float [[DIV]], 0.000000e+00
; CHECK-NEXT: [[SUB:%.*]] = fsub float [[MIN:%.*]], [[A:%.*]]
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[SUB]], [[DIV]]
; CHECK-NEXT: [[SUB1:%.*]] = fsub float [[MAX:%.*]], [[A]]
; CHECK-NEXT: [[MUL2:%.*]] = fmul float [[SUB1]], [[DIV]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br label [[IF_END:%.*]]
; CHECK: if.else:
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[TMAX_0:%.*]] = phi float [ [[MUL2]], [[IF_THEN]] ], [ [[MUL]], [[IF_ELSE]] ]
; CHECK-NEXT: [[TMIN_0:%.*]] = phi float [ [[MUL]], [[IF_THEN]] ], [ [[MUL2]], [[IF_ELSE]] ]
; CHECK-NEXT: [[ADD:%.*]] = fadd float [[TMAX_0]], [[TMIN_0]]
; CHECK-NEXT: ret float [[ADD]]
;
entry:
%div = fdiv float 1.000000e+00, %d
%cmp = fcmp oge float %div, 0.000000e+00
br i1 %cmp, label %if.then, label %if.else
if.then: ; preds = %entry
%sub = fsub float %min, %a
%mul = fmul float %sub, %div
%sub1 = fsub float %max, %a
%mul2 = fmul float %sub1, %div
br label %if.end
if.else: ; preds = %entry
%sub3 = fsub float %max, %a
%mul4 = fmul float %sub3, %div
%sub5 = fsub float %min, %a
%mul6 = fmul float %sub5, %div
br label %if.end
if.end: ; preds = %if.else, %if.then
%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
%add = fadd float %tmax.0, %tmin.0
ret float %add
}
; Check that all loads and scalars depending on the loads are hoisted.
; Check that getelementptr computation gets hoisted before the load.
define float @readsAndScalarsHoisting(float %d, float* %min, float* %max, float* %a) {
; CHECK-LABEL: @readsAndScalarsHoisting(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[DIV:%.*]] = fdiv float 1.000000e+00, [[D:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = fcmp oge float [[DIV]], 0.000000e+00
; CHECK-NEXT: [[TMP0:%.*]] = getelementptr float, float* [[MIN:%.*]], i32 1
; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[TMP0]], align 4
; CHECK-NEXT: [[TMP2:%.*]] = load float, float* [[A:%.*]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = load float, float* [[MAX:%.*]], align 4
; CHECK-NEXT: [[SUB:%.*]] = fsub float [[TMP1]], [[TMP2]]
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[SUB]], [[DIV]]
; CHECK-NEXT: [[SUB1:%.*]] = fsub float [[TMP3]], [[TMP2]]
; CHECK-NEXT: [[MUL2:%.*]] = fmul float [[SUB1]], [[DIV]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[A:%.*]] = getelementptr float, float* [[MIN]], i32 1
; CHECK-NEXT: br label [[IF_END:%.*]]
; CHECK: if.else:
; CHECK-NEXT: [[B:%.*]] = getelementptr float, float* [[MIN]], i32 1
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[TMAX_0:%.*]] = phi float [ [[MUL2]], [[IF_THEN]] ], [ [[MUL]], [[IF_ELSE]] ]
; CHECK-NEXT: [[TMIN_0:%.*]] = phi float [ [[MUL]], [[IF_THEN]] ], [ [[MUL2]], [[IF_ELSE]] ]
; CHECK-NEXT: [[ADD:%.*]] = fadd float [[TMAX_0]], [[TMIN_0]]
; CHECK-NEXT: ret float [[ADD]]
;
entry:
%div = fdiv float 1.000000e+00, %d
%cmp = fcmp oge float %div, 0.000000e+00
br i1 %cmp, label %if.then, label %if.else
if.then: ; preds = %entry
%A = getelementptr float, float* %min, i32 1
%0 = load float, float* %A, align 4
%1 = load float, float* %a, align 4
%sub = fsub float %0, %1
%mul = fmul float %sub, %div
%2 = load float, float* %max, align 4
%sub1 = fsub float %2, %1
%mul2 = fmul float %sub1, %div
br label %if.end
if.else: ; preds = %entry
%3 = load float, float* %max, align 4
%4 = load float, float* %a, align 4
%sub3 = fsub float %3, %4
%mul4 = fmul float %sub3, %div
%B = getelementptr float, float* %min, i32 1
%5 = load float, float* %B, align 4
%sub5 = fsub float %5, %4
%mul6 = fmul float %sub5, %div
br label %if.end
if.end: ; preds = %if.else, %if.then
%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
%add = fadd float %tmax.0, %tmin.0
ret float %add
}
; Check that we do not hoist loads after a store: the first two loads will be
; hoisted, and then the third load will not be hoisted.
define float @readsAndWrites(float %d, float* %min, float* %max, float* %a) {
; CHECK-LABEL: @readsAndWrites(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[DIV:%.*]] = fdiv float 1.000000e+00, [[D:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = fcmp oge float [[DIV]], 0.000000e+00
; CHECK-NEXT: [[TMP0:%.*]] = load float, float* [[MIN:%.*]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[A:%.*]], align 4
; CHECK-NEXT: [[SUB:%.*]] = fsub float [[TMP0]], [[TMP1]]
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[SUB]], [[DIV]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: store float [[TMP0]], float* @GlobalVar, align 4
; CHECK-NEXT: [[TMP2:%.*]] = load float, float* [[MAX:%.*]], align 4
; CHECK-NEXT: [[SUB1:%.*]] = fsub float [[TMP2]], [[TMP1]]
; CHECK-NEXT: [[MUL2:%.*]] = fmul float [[SUB1]], [[DIV]]
; CHECK-NEXT: br label [[IF_END:%.*]]
; CHECK: if.else:
; CHECK-NEXT: [[TMP3:%.*]] = load float, float* [[MAX]], align 4
; CHECK-NEXT: [[SUB3:%.*]] = fsub float [[TMP3]], [[TMP1]]
; CHECK-NEXT: [[MUL4:%.*]] = fmul float [[SUB3]], [[DIV]]
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[TMAX_0:%.*]] = phi float [ [[MUL2]], [[IF_THEN]] ], [ [[MUL]], [[IF_ELSE]] ]
; CHECK-NEXT: [[TMIN_0:%.*]] = phi float [ [[MUL]], [[IF_THEN]] ], [ [[MUL4]], [[IF_ELSE]] ]
; CHECK-NEXT: [[ADD:%.*]] = fadd float [[TMAX_0]], [[TMIN_0]]
; CHECK-NEXT: ret float [[ADD]]
;
entry:
%div = fdiv float 1.000000e+00, %d
%cmp = fcmp oge float %div, 0.000000e+00
br i1 %cmp, label %if.then, label %if.else
if.then: ; preds = %entry
%0 = load float, float* %min, align 4
%1 = load float, float* %a, align 4
store float %0, float* @GlobalVar
%sub = fsub float %0, %1
%mul = fmul float %sub, %div
%2 = load float, float* %max, align 4
%sub1 = fsub float %2, %1
%mul2 = fmul float %sub1, %div
br label %if.end
if.else: ; preds = %entry
%3 = load float, float* %max, align 4
%4 = load float, float* %a, align 4
%sub3 = fsub float %3, %4
%mul4 = fmul float %sub3, %div
%5 = load float, float* %min, align 4
%sub5 = fsub float %5, %4
%mul6 = fmul float %sub5, %div
br label %if.end
if.end: ; preds = %if.else, %if.then
%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
%add = fadd float %tmax.0, %tmin.0
ret float %add
}
; Check that we do hoist loads when the store is above the insertion point.
define float @readsAndWriteAboveInsertPt(float %d, float* %min, float* %max, float* %a) {
; CHECK-LABEL: @readsAndWriteAboveInsertPt(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[DIV:%.*]] = fdiv float 1.000000e+00, [[D:%.*]]
; CHECK-NEXT: store float 0.000000e+00, float* @GlobalVar, align 4
; CHECK-NEXT: [[CMP:%.*]] = fcmp oge float [[DIV]], 0.000000e+00
; CHECK-NEXT: [[TMP0:%.*]] = load float, float* [[MIN:%.*]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[A:%.*]], align 4
; CHECK-NEXT: [[TMP2:%.*]] = load float, float* [[MAX:%.*]], align 4
; CHECK-NEXT: [[SUB:%.*]] = fsub float [[TMP0]], [[TMP1]]
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[SUB]], [[DIV]]
; CHECK-NEXT: [[SUB1:%.*]] = fsub float [[TMP2]], [[TMP1]]
; CHECK-NEXT: [[MUL2:%.*]] = fmul float [[SUB1]], [[DIV]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br label [[IF_END:%.*]]
; CHECK: if.else:
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[TMAX_0:%.*]] = phi float [ [[MUL2]], [[IF_THEN]] ], [ [[MUL]], [[IF_ELSE]] ]
; CHECK-NEXT: [[TMIN_0:%.*]] = phi float [ [[MUL]], [[IF_THEN]] ], [ [[MUL2]], [[IF_ELSE]] ]
; CHECK-NEXT: [[ADD:%.*]] = fadd float [[TMAX_0]], [[TMIN_0]]
; CHECK-NEXT: ret float [[ADD]]
;
entry:
%div = fdiv float 1.000000e+00, %d
store float 0.000000e+00, float* @GlobalVar
%cmp = fcmp oge float %div, 0.000000e+00
br i1 %cmp, label %if.then, label %if.else
if.then: ; preds = %entry
%0 = load float, float* %min, align 4
%1 = load float, float* %a, align 4
%sub = fsub float %0, %1
%mul = fmul float %sub, %div
%2 = load float, float* %max, align 4
%sub1 = fsub float %2, %1
%mul2 = fmul float %sub1, %div
br label %if.end
if.else: ; preds = %entry
%3 = load float, float* %max, align 4
%4 = load float, float* %a, align 4
%sub3 = fsub float %3, %4
%mul4 = fmul float %sub3, %div
%5 = load float, float* %min, align 4
%sub5 = fsub float %5, %4
%mul6 = fmul float %sub5, %div
br label %if.end
if.end: ; preds = %if.else, %if.then
%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
%add = fadd float %tmax.0, %tmin.0
ret float %add
}
; Check that dependent expressions are hoisted.
define float @dependentScalarsHoisting(float %a, float %b, i1 %c) {
; CHECK-LABEL: @dependentScalarsHoisting(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[D:%.*]] = fsub float [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: [[E:%.*]] = fadd float [[D]], [[A]]
; CHECK-NEXT: [[F:%.*]] = fdiv float [[E]], [[A]]
; CHECK-NEXT: [[G:%.*]] = fmul float [[F]], [[A]]
; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br label [[IF_END:%.*]]
; CHECK: if.else:
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[R:%.*]] = phi float [ [[G]], [[IF_THEN]] ], [ [[G]], [[IF_ELSE]] ]
; CHECK-NEXT: ret float [[R]]
;
entry:
br i1 %c, label %if.then, label %if.else
if.then:
%d = fsub float %b, %a
%e = fadd float %d, %a
%f = fdiv float %e, %a
%g = fmul float %f, %a
br label %if.end
if.else:
%h = fsub float %b, %a
%i = fadd float %h, %a
%j = fdiv float %i, %a
%k = fmul float %j, %a
br label %if.end
if.end:
%r = phi float [ %g, %if.then ], [ %k, %if.else ]
ret float %r
}
; Check that all independent expressions are hoisted.
define float @independentScalarsHoisting(float %a, float %b, i1 %c) {
; CHECK-LABEL: @independentScalarsHoisting(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[D:%.*]] = fadd float [[B:%.*]], [[A:%.*]]
; CHECK-NEXT: [[E:%.*]] = fsub float [[B]], [[A]]
; CHECK-NEXT: [[F:%.*]] = fdiv float [[B]], [[A]]
; CHECK-NEXT: [[G:%.*]] = fmul float [[B]], [[A]]
; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br label [[IF_END:%.*]]
; CHECK: if.else:
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[P:%.*]] = phi float [ [[D]], [[IF_THEN]] ], [ [[D]], [[IF_ELSE]] ]
; CHECK-NEXT: [[Q:%.*]] = phi float [ [[E]], [[IF_THEN]] ], [ [[E]], [[IF_ELSE]] ]
; CHECK-NEXT: [[R:%.*]] = phi float [ [[F]], [[IF_THEN]] ], [ [[F]], [[IF_ELSE]] ]
; CHECK-NEXT: [[S:%.*]] = phi float [ [[G]], [[IF_THEN]] ], [ [[G]], [[IF_ELSE]] ]
; CHECK-NEXT: [[T:%.*]] = fadd float [[P]], [[Q]]
; CHECK-NEXT: [[U:%.*]] = fadd float [[R]], [[S]]
; CHECK-NEXT: [[V:%.*]] = fadd float [[T]], [[U]]
; CHECK-NEXT: ret float [[V]]
;
entry:
br i1 %c, label %if.then, label %if.else
if.then:
%d = fadd float %b, %a
%e = fsub float %b, %a
%f = fdiv float %b, %a
%g = fmul float %b, %a
br label %if.end
if.else:
%i = fadd float %b, %a
%h = fsub float %b, %a
%j = fdiv float %b, %a
%k = fmul float %b, %a
br label %if.end
if.end:
%p = phi float [ %d, %if.then ], [ %i, %if.else ]
%q = phi float [ %e, %if.then ], [ %h, %if.else ]
%r = phi float [ %f, %if.then ], [ %j, %if.else ]
%s = phi float [ %g, %if.then ], [ %k, %if.else ]
%t = fadd float %p, %q
%u = fadd float %r, %s
%v = fadd float %t, %u
ret float %v
}
; Check that we hoist load and scalar expressions in triangles.
define float @triangleHoisting(float %d, float* %min, float* %max, float* %a) {
; CHECK-LABEL: @triangleHoisting(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[DIV:%.*]] = fdiv float 1.000000e+00, [[D:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = fcmp oge float [[DIV]], 0.000000e+00
; CHECK-NEXT: [[TMP0:%.*]] = load float, float* [[MIN:%.*]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[A:%.*]], align 4
; CHECK-NEXT: [[TMP2:%.*]] = load float, float* [[MAX:%.*]], align 4
; CHECK-NEXT: [[SUB5:%.*]] = fsub float [[TMP0]], [[TMP1]]
; CHECK-NEXT: [[MUL6:%.*]] = fmul float [[SUB5]], [[DIV]]
; CHECK-NEXT: [[SUB3:%.*]] = fsub float [[TMP2]], [[TMP1]]
; CHECK-NEXT: [[MUL4:%.*]] = fmul float [[SUB3]], [[DIV]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[P1:%.*]] = phi float [ [[MUL4]], [[IF_THEN]] ], [ 0.000000e+00, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[P2:%.*]] = phi float [ [[MUL6]], [[IF_THEN]] ], [ 0.000000e+00, [[ENTRY]] ]
; CHECK-NEXT: [[X:%.*]] = fadd float [[P1]], [[MUL6]]
; CHECK-NEXT: [[Y:%.*]] = fadd float [[P2]], [[MUL4]]
; CHECK-NEXT: [[Z:%.*]] = fadd float [[X]], [[Y]]
; CHECK-NEXT: ret float [[Z]]
;
entry:
%div = fdiv float 1.000000e+00, %d
%cmp = fcmp oge float %div, 0.000000e+00
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
%0 = load float, float* %min, align 4
%1 = load float, float* %a, align 4
%sub = fsub float %0, %1
%mul = fmul float %sub, %div
%2 = load float, float* %max, align 4
%sub1 = fsub float %2, %1
%mul2 = fmul float %sub1, %div
br label %if.end
if.end: ; preds = %entry
%p1 = phi float [ %mul2, %if.then ], [ 0.000000e+00, %entry ]
%p2 = phi float [ %mul, %if.then ], [ 0.000000e+00, %entry ]
%3 = load float, float* %max, align 4
%4 = load float, float* %a, align 4
%sub3 = fsub float %3, %4
%mul4 = fmul float %sub3, %div
%5 = load float, float* %min, align 4
%sub5 = fsub float %5, %4
%mul6 = fmul float %sub5, %div
%x = fadd float %p1, %mul6
%y = fadd float %p2, %mul4
%z = fadd float %x, %y
ret float %z
}
; Check that we do not hoist loads past stores within a same basic block.
define i32 @noHoistInSingleBBWithStore() {
; CHECK-LABEL: @noHoistInSingleBBWithStore(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[D:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32* [[D]] to i8*
; CHECK-NEXT: [[BF:%.*]] = load i8, i8* [[TMP0]], align 4
; CHECK-NEXT: [[BF_CLEAR:%.*]] = and i8 [[BF]], -3
; CHECK-NEXT: store i8 [[BF_CLEAR]], i8* [[TMP0]], align 4
; CHECK-NEXT: [[BF1:%.*]] = load i8, i8* [[TMP0]], align 4
; CHECK-NEXT: [[BF_CLEAR1:%.*]] = and i8 [[BF1]], 1
; CHECK-NEXT: store i8 [[BF_CLEAR1]], i8* [[TMP0]], align 4
; CHECK-NEXT: ret i32 0
;
entry:
%D = alloca i32, align 4
%0 = bitcast i32* %D to i8*
%bf = load i8, i8* %0, align 4
%bf.clear = and i8 %bf, -3
store i8 %bf.clear, i8* %0, align 4
%bf1 = load i8, i8* %0, align 4
%bf.clear1 = and i8 %bf1, 1
store i8 %bf.clear1, i8* %0, align 4
ret i32 0
}
; Check that we do not hoist loads past calls within a same basic block.
declare void @foo()
define i32 @noHoistInSingleBBWithCall() {
; CHECK-LABEL: @noHoistInSingleBBWithCall(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[D:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32* [[D]] to i8*
; CHECK-NEXT: [[BF:%.*]] = load i8, i8* [[TMP0]], align 4
; CHECK-NEXT: [[BF_CLEAR:%.*]] = and i8 [[BF]], -3
; CHECK-NEXT: call void @foo()
; CHECK-NEXT: [[BF1:%.*]] = load i8, i8* [[TMP0]], align 4
; CHECK-NEXT: [[BF_CLEAR1:%.*]] = and i8 [[BF1]], 1
; CHECK-NEXT: ret i32 0
;
entry:
%D = alloca i32, align 4
%0 = bitcast i32* %D to i8*
%bf = load i8, i8* %0, align 4
%bf.clear = and i8 %bf, -3
call void @foo()
%bf1 = load i8, i8* %0, align 4
%bf.clear1 = and i8 %bf1, 1
ret i32 0
}
; Check that we do not hoist loads past stores in any branch of a diamond.
define float @noHoistInDiamondWithOneStore1(float %d, float* %min, float* %max, float* %a) {
; CHECK-LABEL: @noHoistInDiamondWithOneStore1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[DIV:%.*]] = fdiv float 1.000000e+00, [[D:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = fcmp oge float [[DIV]], 0.000000e+00
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: store float 0.000000e+00, float* @GlobalVar, align 4
; CHECK-NEXT: [[TMP0:%.*]] = load float, float* [[MIN:%.*]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[A:%.*]], align 4
; CHECK-NEXT: [[SUB:%.*]] = fsub float [[TMP0]], [[TMP1]]
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[SUB]], [[DIV]]
; CHECK-NEXT: [[TMP2:%.*]] = load float, float* [[MAX:%.*]], align 4
; CHECK-NEXT: [[SUB1:%.*]] = fsub float [[TMP2]], [[TMP1]]
; CHECK-NEXT: [[MUL2:%.*]] = fmul float [[SUB1]], [[DIV]]
; CHECK-NEXT: br label [[IF_END:%.*]]
; CHECK: if.else:
; CHECK-NEXT: [[TMP3:%.*]] = load float, float* [[MAX]], align 4
; CHECK-NEXT: [[TMP4:%.*]] = load float, float* [[A]], align 4
; CHECK-NEXT: [[SUB3:%.*]] = fsub float [[TMP3]], [[TMP4]]
; CHECK-NEXT: [[MUL4:%.*]] = fmul float [[SUB3]], [[DIV]]
; CHECK-NEXT: [[TMP5:%.*]] = load float, float* [[MIN]], align 4
; CHECK-NEXT: [[SUB5:%.*]] = fsub float [[TMP5]], [[TMP4]]
; CHECK-NEXT: [[MUL6:%.*]] = fmul float [[SUB5]], [[DIV]]
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[TMAX_0:%.*]] = phi float [ [[MUL2]], [[IF_THEN]] ], [ [[MUL6]], [[IF_ELSE]] ]
; CHECK-NEXT: [[TMIN_0:%.*]] = phi float [ [[MUL]], [[IF_THEN]] ], [ [[MUL4]], [[IF_ELSE]] ]
; CHECK-NEXT: [[TMP6:%.*]] = load float, float* [[MAX]], align 4
; CHECK-NEXT: [[TMP7:%.*]] = load float, float* [[A]], align 4
; CHECK-NEXT: [[SUB6:%.*]] = fsub float [[TMP6]], [[TMP7]]
; CHECK-NEXT: [[MUL7:%.*]] = fmul float [[SUB6]], [[DIV]]
; CHECK-NEXT: [[TMP8:%.*]] = load float, float* [[MIN]], align 4
; CHECK-NEXT: [[SUB8:%.*]] = fsub float [[TMP8]], [[TMP7]]
; CHECK-NEXT: [[MUL9:%.*]] = fmul float [[SUB8]], [[DIV]]
; CHECK-NEXT: [[ADD:%.*]] = fadd float [[TMAX_0]], [[TMIN_0]]
; CHECK-NEXT: ret float [[ADD]]
;
entry:
%div = fdiv float 1.000000e+00, %d
%cmp = fcmp oge float %div, 0.000000e+00
br i1 %cmp, label %if.then, label %if.else
if.then: ; preds = %entry
store float 0.000000e+00, float* @GlobalVar
%0 = load float, float* %min, align 4
%1 = load float, float* %a, align 4
%sub = fsub float %0, %1
%mul = fmul float %sub, %div
%2 = load float, float* %max, align 4
%sub1 = fsub float %2, %1
%mul2 = fmul float %sub1, %div
br label %if.end
if.else: ; preds = %entry
; There are no side effects on the if.else branch.
%3 = load float, float* %max, align 4
%4 = load float, float* %a, align 4
%sub3 = fsub float %3, %4
%mul4 = fmul float %sub3, %div
%5 = load float, float* %min, align 4
%sub5 = fsub float %5, %4
%mul6 = fmul float %sub5, %div
br label %if.end
if.end: ; preds = %if.else, %if.then
%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
%6 = load float, float* %max, align 4
%7 = load float, float* %a, align 4
%sub6 = fsub float %6, %7
%mul7 = fmul float %sub6, %div
%8 = load float, float* %min, align 4
%sub8 = fsub float %8, %7
%mul9 = fmul float %sub8, %div
%add = fadd float %tmax.0, %tmin.0
ret float %add
}
; Check that we do not hoist loads past stores from half diamond.
define float @noHoistInHalfDiamondPastStore(float %d, float* %min, float* %max, float* %a) {
; CHECK-LABEL: @noHoistInHalfDiamondPastStore(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[DIV:%.*]] = fdiv float 1.000000e+00, [[D:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = fcmp oge float [[DIV]], 0.000000e+00
; CHECK-NEXT: [[TMP0:%.*]] = load float, float* [[MIN:%.*]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[A:%.*]], align 4
; CHECK-NEXT: store float 0.000000e+00, float* @GlobalVar, align 4
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[TMP2:%.*]] = load float, float* [[MAX:%.*]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = load float, float* [[A]], align 4
; CHECK-NEXT: [[SUB3:%.*]] = fsub float [[TMP2]], [[TMP3]]
; CHECK-NEXT: [[MUL4:%.*]] = fmul float [[SUB3]], [[DIV]]
; CHECK-NEXT: [[TMP4:%.*]] = load float, float* [[MIN]], align 4
; CHECK-NEXT: [[SUB5:%.*]] = fsub float [[TMP4]], [[TMP3]]
; CHECK-NEXT: [[MUL6:%.*]] = fmul float [[SUB5]], [[DIV]]
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[TMAX_0:%.*]] = phi float [ [[MUL4]], [[IF_THEN]] ], [ [[TMP0]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[TMIN_0:%.*]] = phi float [ [[MUL6]], [[IF_THEN]] ], [ [[TMP1]], [[ENTRY]] ]
; CHECK-NEXT: [[ADD:%.*]] = fadd float [[TMAX_0]], [[TMIN_0]]
; CHECK-NEXT: ret float [[ADD]]
;
entry:
%div = fdiv float 1.000000e+00, %d
%cmp = fcmp oge float %div, 0.000000e+00
%0 = load float, float* %min, align 4
%1 = load float, float* %a, align 4
; Loads should not be hoisted above this store.
store float 0.000000e+00, float* @GlobalVar
br i1 %cmp, label %if.then, label %if.end
if.then:
; There are no side effects on the if.then branch.
%2 = load float, float* %max, align 4
%3 = load float, float* %a, align 4
%sub3 = fsub float %2, %3
%mul4 = fmul float %sub3, %div
%4 = load float, float* %min, align 4
%sub5 = fsub float %4, %3
%mul6 = fmul float %sub5, %div
br label %if.end
if.end:
%tmax.0 = phi float [ %mul4, %if.then ], [ %0, %entry ]
%tmin.0 = phi float [ %mul6, %if.then ], [ %1, %entry ]
%add = fadd float %tmax.0, %tmin.0
ret float %add
}
; Check that we do not hoist loads past a store in any branch of a diamond.
define float @noHoistInDiamondWithOneStore2(float %d, float* %min, float* %max, float* %a) {
; CHECK-LABEL: @noHoistInDiamondWithOneStore2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[DIV:%.*]] = fdiv float 1.000000e+00, [[D:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = fcmp oge float [[DIV]], 0.000000e+00
; CHECK-NEXT: br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[TMP0:%.*]] = load float, float* [[MIN:%.*]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[A:%.*]], align 4
; CHECK-NEXT: [[SUB:%.*]] = fsub float [[TMP0]], [[TMP1]]
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[SUB]], [[DIV]]
; CHECK-NEXT: [[TMP2:%.*]] = load float, float* [[MAX:%.*]], align 4
; CHECK-NEXT: [[SUB1:%.*]] = fsub float [[TMP2]], [[TMP1]]
; CHECK-NEXT: [[MUL2:%.*]] = fmul float [[SUB1]], [[DIV]]
; CHECK-NEXT: br label [[IF_END:%.*]]
; CHECK: if.else:
; CHECK-NEXT: store float 0.000000e+00, float* @GlobalVar, align 4
; CHECK-NEXT: [[TMP3:%.*]] = load float, float* [[MAX]], align 4
; CHECK-NEXT: [[TMP4:%.*]] = load float, float* [[A]], align 4
; CHECK-NEXT: [[SUB3:%.*]] = fsub float [[TMP3]], [[TMP4]]
; CHECK-NEXT: [[MUL4:%.*]] = fmul float [[SUB3]], [[DIV]]
; CHECK-NEXT: [[TMP5:%.*]] = load float, float* [[MIN]], align 4
; CHECK-NEXT: [[SUB5:%.*]] = fsub float [[TMP5]], [[TMP4]]
; CHECK-NEXT: [[MUL6:%.*]] = fmul float [[SUB5]], [[DIV]]
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[TMAX_0:%.*]] = phi float [ [[MUL2]], [[IF_THEN]] ], [ [[MUL6]], [[IF_ELSE]] ]
; CHECK-NEXT: [[TMIN_0:%.*]] = phi float [ [[MUL]], [[IF_THEN]] ], [ [[MUL4]], [[IF_ELSE]] ]
; CHECK-NEXT: [[TMP6:%.*]] = load float, float* [[MAX]], align 4
; CHECK-NEXT: [[TMP7:%.*]] = load float, float* [[A]], align 4
; CHECK-NEXT: [[SUB6:%.*]] = fsub float [[TMP6]], [[TMP7]]
; CHECK-NEXT: [[MUL7:%.*]] = fmul float [[SUB6]], [[DIV]]
; CHECK-NEXT: [[TMP8:%.*]] = load float, float* [[MIN]], align 4
; CHECK-NEXT: [[SUB8:%.*]] = fsub float [[TMP8]], [[TMP7]]
; CHECK-NEXT: [[MUL9:%.*]] = fmul float [[SUB8]], [[DIV]]
; CHECK-NEXT: [[ADD:%.*]] = fadd float [[TMAX_0]], [[TMIN_0]]
; CHECK-NEXT: ret float [[ADD]]
;
entry:
%div = fdiv float 1.000000e+00, %d
%cmp = fcmp oge float %div, 0.000000e+00
br i1 %cmp, label %if.then, label %if.else
if.then: ; preds = %entry
; There are no side effects on the if.then branch.
%0 = load float, float* %min, align 4
%1 = load float, float* %a, align 4
%sub = fsub float %0, %1
%mul = fmul float %sub, %div
%2 = load float, float* %max, align 4
%sub1 = fsub float %2, %1
%mul2 = fmul float %sub1, %div
br label %if.end
if.else: ; preds = %entry
store float 0.000000e+00, float* @GlobalVar
%3 = load float, float* %max, align 4
%4 = load float, float* %a, align 4
%sub3 = fsub float %3, %4
%mul4 = fmul float %sub3, %div
%5 = load float, float* %min, align 4
%sub5 = fsub float %5, %4
%mul6 = fmul float %sub5, %div
br label %if.end
if.end: ; preds = %if.else, %if.then
%tmax.0 = phi float [ %mul2, %if.then ], [ %mul6, %if.else ]
%tmin.0 = phi float [ %mul, %if.then ], [ %mul4, %if.else ]
%6 = load float, float* %max, align 4
%7 = load float, float* %a, align 4
%sub6 = fsub float %6, %7
%mul7 = fmul float %sub6, %div
%8 = load float, float* %min, align 4
%sub8 = fsub float %8, %7
%mul9 = fmul float %sub8, %div
%add = fadd float %tmax.0, %tmin.0
ret float %add
}
; Check that we do not hoist loads outside a loop containing stores.
define float @noHoistInLoopsWithStores(float %d, float* %min, float* %max, float* %a) {
; CHECK-LABEL: @noHoistInLoopsWithStores(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[DIV:%.*]] = fdiv float 1.000000e+00, [[D:%.*]]
; CHECK-NEXT: [[CMP:%.*]] = fcmp oge float [[DIV]], 0.000000e+00
; CHECK-NEXT: br i1 [[CMP]], label [[DO_BODY:%.*]], label [[IF_ELSE:%.*]]
; CHECK: do.body:
; CHECK-NEXT: [[TMP0:%.*]] = load float, float* [[MIN:%.*]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[A:%.*]], align 4
; CHECK-NEXT: store float 0.000000e+00, float* @GlobalVar, align 4
; CHECK-NEXT: [[SUB:%.*]] = fsub float [[TMP0]], [[TMP1]]
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[SUB]], [[DIV]]
; CHECK-NEXT: [[TMP2:%.*]] = load float, float* [[MAX:%.*]], align 4
; CHECK-NEXT: [[SUB1:%.*]] = fsub float [[TMP2]], [[TMP1]]
; CHECK-NEXT: [[MUL2:%.*]] = fmul float [[SUB1]], [[DIV]]
; CHECK-NEXT: br label [[WHILE_COND:%.*]]
; CHECK: while.cond:
; CHECK-NEXT: [[CMP1:%.*]] = fcmp oge float [[MUL2]], 0.000000e+00
; CHECK-NEXT: br i1 [[CMP1]], label [[IF_END:%.*]], label [[DO_BODY]]
; CHECK: if.else:
; CHECK-NEXT: [[TMP3:%.*]] = load float, float* [[MAX]], align 4
; CHECK-NEXT: [[TMP4:%.*]] = load float, float* [[A]], align 4
; CHECK-NEXT: [[SUB3:%.*]] = fsub float [[TMP3]], [[TMP4]]
; CHECK-NEXT: [[MUL4:%.*]] = fmul float [[SUB3]], [[DIV]]
; CHECK-NEXT: [[TMP5:%.*]] = load float, float* [[MIN]], align 4
; CHECK-NEXT: [[SUB5:%.*]] = fsub float [[TMP5]], [[TMP4]]
; CHECK-NEXT: [[MUL6:%.*]] = fmul float [[SUB5]], [[DIV]]
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: [[TMAX_0:%.*]] = phi float [ [[MUL2]], [[WHILE_COND]] ], [ [[MUL6]], [[IF_ELSE]] ]
; CHECK-NEXT: [[TMIN_0:%.*]] = phi float [ [[MUL]], [[WHILE_COND]] ], [ [[MUL4]], [[IF_ELSE]] ]
; CHECK-NEXT: [[ADD:%.*]] = fadd float [[TMAX_0]], [[TMIN_0]]
; CHECK-NEXT: ret float [[ADD]]
;
entry:
%div = fdiv float 1.000000e+00, %d
%cmp = fcmp oge float %div, 0.000000e+00
br i1 %cmp, label %do.body, label %if.else
do.body:
%0 = load float, float* %min, align 4
%1 = load float, float* %a, align 4
; It is unsafe to hoist the loads outside the loop because of the store.
store float 0.000000e+00, float* @GlobalVar
%sub = fsub float %0, %1
%mul = fmul float %sub, %div
%2 = load float, float* %max, align 4
%sub1 = fsub float %2, %1
%mul2 = fmul float %sub1, %div
br label %while.cond
while.cond:
%cmp1 = fcmp oge float %mul2, 0.000000e+00
br i1 %cmp1, label %if.end, label %do.body
if.else:
%3 = load float, float* %max, align 4
%4 = load float, float* %a, align 4
%sub3 = fsub float %3, %4
%mul4 = fmul float %sub3, %div
%5 = load float, float* %min, align 4
%sub5 = fsub float %5, %4
%mul6 = fmul float %sub5, %div
br label %if.end
if.end:
%tmax.0 = phi float [ %mul2, %while.cond ], [ %mul6, %if.else ]
%tmin.0 = phi float [ %mul, %while.cond ], [ %mul4, %if.else ]
%add = fadd float %tmax.0, %tmin.0
ret float %add
}
; Check that we hoist stores: all the instructions from the then branch
; should be hoisted.
%struct.foo = type { i16* }
define void @hoistStores(%struct.foo* %s, i32* %coord, i1 zeroext %delta) {
; CHECK-LABEL: @hoistStores(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[FROMBOOL:%.*]] = zext i1 [[DELTA:%.*]] to i8
; CHECK-NEXT: [[TOBOOL:%.*]] = trunc i8 [[FROMBOOL]] to i1
; CHECK-NEXT: [[TMP0:%.*]] = getelementptr inbounds [[STRUCT_FOO:%.*]], %struct.foo* [[S:%.*]], i32 0, i32 0
; CHECK-NEXT: [[TMP1:%.*]] = load i16*, i16** [[TMP0]], align 8
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds [[STRUCT_FOO]], %struct.foo* [[S]], i32 0, i32 0
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i16, i16* [[TMP1]], i32 1
; CHECK-NEXT: store i16* [[TMP3]], i16** [[TMP2]], align 8
; CHECK-NEXT: [[TMP4:%.*]] = load i16, i16* [[TMP1]], align 2
; CHECK-NEXT: [[TMP5:%.*]] = load i32, i32* [[COORD:%.*]], align 4
; CHECK-NEXT: [[CONV:%.*]] = zext i16 [[TMP4]] to i32
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[TMP5]], [[CONV]]
; CHECK-NEXT: store i32 [[ADD]], i32* [[COORD]], align 4
; CHECK-NEXT: br i1 [[TOBOOL]], label [[IF_THEN:%.*]], label [[IF_ELSE:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[P:%.*]] = getelementptr inbounds [[STRUCT_FOO]], %struct.foo* [[S]], i32 0, i32 0
; CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds i16, i16* [[TMP1]], i32 1
; CHECK-NEXT: br label [[IF_END:%.*]]
; CHECK: if.else:
; CHECK-NEXT: [[P1:%.*]] = getelementptr inbounds [[STRUCT_FOO]], %struct.foo* [[S]], i32 0, i32 0
; CHECK-NEXT: [[INCDEC_PTR2:%.*]] = getelementptr inbounds i16, i16* [[TMP1]], i32 1
; CHECK-NEXT: [[TMP6:%.*]] = load i16*, i16** [[P1]], align 8
; CHECK-NEXT: [[INCDEC_PTR6:%.*]] = getelementptr inbounds i16, i16* [[TMP6]], i32 1
; CHECK-NEXT: store i16* [[INCDEC_PTR6]], i16** [[P1]], align 8
; CHECK-NEXT: [[TMP7:%.*]] = load i16, i16* [[TMP6]], align 2
; CHECK-NEXT: [[CONV7:%.*]] = zext i16 [[TMP7]] to i32
; CHECK-NEXT: [[SHL:%.*]] = shl i32 [[CONV7]], 8
; CHECK-NEXT: [[TMP8:%.*]] = load i32, i32* [[COORD]], align 4
; CHECK-NEXT: [[ADD8:%.*]] = add i32 [[TMP8]], [[SHL]]
; CHECK-NEXT: store i32 [[ADD8]], i32* [[COORD]], align 4
; CHECK-NEXT: br label [[IF_END]]
; CHECK: if.end:
; CHECK-NEXT: ret void
;
entry:
%frombool = zext i1 %delta to i8
%tobool = trunc i8 %frombool to i1
br i1 %tobool, label %if.then, label %if.else
if.then: ; preds = %entry
%p = getelementptr inbounds %struct.foo, %struct.foo* %s, i32 0, i32 0
%0 = load i16*, i16** %p, align 8
%incdec.ptr = getelementptr inbounds i16, i16* %0, i32 1
store i16* %incdec.ptr, i16** %p, align 8
%1 = load i16, i16* %0, align 2
%conv = zext i16 %1 to i32
%2 = load i32, i32* %coord, align 4
%add = add i32 %2, %conv
store i32 %add, i32* %coord, align 4
br label %if.end
if.else: ; preds = %entry
%p1 = getelementptr inbounds %struct.foo, %struct.foo* %s, i32 0, i32 0
%3 = load i16*, i16** %p1, align 8
%incdec.ptr2 = getelementptr inbounds i16, i16* %3, i32 1
store i16* %incdec.ptr2, i16** %p1, align 8
%4 = load i16, i16* %3, align 2
%conv3 = zext i16 %4 to i32
%5 = load i32, i32* %coord, align 4
%add4 = add i32 %5, %conv3
store i32 %add4, i32* %coord, align 4
%6 = load i16*, i16** %p1, align 8
%incdec.ptr6 = getelementptr inbounds i16, i16* %6, i32 1
store i16* %incdec.ptr6, i16** %p1, align 8
%7 = load i16, i16* %6, align 2
%conv7 = zext i16 %7 to i32
%shl = shl i32 %conv7, 8
%8 = load i32, i32* %coord, align 4
%add8 = add i32 %8, %shl
store i32 %add8, i32* %coord, align 4
br label %if.end
if.end: ; preds = %if.else, %if.then
ret void
}
define i32 @mergeAlignments(i1 %b, i32* %y) {
; CHECK-LABEL: @mergeAlignments(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[L1:%.*]] = load i32, i32* [[Y:%.*]], align 1
; CHECK-NEXT: br i1 [[B:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK: if.then:
; CHECK-NEXT: br label [[RETURN:%.*]]
; CHECK: if.end:
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: [[RETVAL_0:%.*]] = phi i32 [ [[L1]], [[IF_THEN]] ], [ [[L1]], [[IF_END]] ]
; CHECK-NEXT: ret i32 [[RETVAL_0]]
;
entry:
br i1 %b, label %if.then, label %if.end
if.then: ; preds = %entry
%l1 = load i32, i32* %y, align 4
br label %return
if.end: ; preds = %entry
%l2 = load i32, i32* %y, align 1
br label %return
return: ; preds = %if.end, %if.then
%retval.0 = phi i32 [ %l1, %if.then ], [ %l2, %if.end ]
ret i32 %retval.0
}
declare i8 @pr30991_f() nounwind readonly
declare void @pr30991_f1(i8)
define i8 @pr30991(i8* %sp, i8* %word, i1 %b1, i1 %b2) {
; CHECK-LABEL: @pr30991(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[R0:%.*]] = load i8, i8* [[WORD:%.*]], align 1
; CHECK-NEXT: br i1 [[B1:%.*]], label [[A:%.*]], label [[B:%.*]]
; CHECK: a:
; CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr i8, i8* [[SP:%.*]], i32 1
; CHECK-NEXT: [[RR0:%.*]] = call i8 @pr30991_f() #[[ATTR0:[0-9]+]]
; CHECK-NEXT: call void @pr30991_f1(i8 [[R0]])
; CHECK-NEXT: ret i8 [[RR0]]
; CHECK: b:
; CHECK-NEXT: br i1 [[B2:%.*]], label [[C:%.*]], label [[X:%.*]]
; CHECK: c:
; CHECK-NEXT: [[INCDEC_PTR115:%.*]] = getelementptr i8, i8* [[SP]], i32 1
; CHECK-NEXT: [[RR1:%.*]] = call i8 @pr30991_f() #[[ATTR0]]
; CHECK-NEXT: call void @pr30991_f1(i8 [[R0]])
; CHECK-NEXT: ret i8 [[RR1]]
; CHECK: x:
; CHECK-NEXT: ret i8 [[R0]]
;
entry:
br i1 %b1, label %a, label %b
a:
%r0 = load i8, i8* %word, align 1
%incdec.ptr = getelementptr i8, i8* %sp, i32 1
%rr0 = call i8 @pr30991_f() nounwind readonly
call void @pr30991_f1(i8 %r0)
ret i8 %rr0
b:
br i1 %b2, label %c, label %x
c:
%r1 = load i8, i8* %word, align 1
%incdec.ptr115 = getelementptr i8, i8* %sp, i32 1
%rr1 = call i8 @pr30991_f() nounwind readonly
call void @pr30991_f1(i8 %r1)
ret i8 %rr1
x:
%r2 = load i8, i8* %word, align 1
ret i8 %r2
}