llvm/test/Transforms/SCCP/loadtest.ll

; This test makes sure that these instructions are properly constant propagated.

; RUN: opt < %s -data-layout="e-p:32:32" -passes=debugify,sccp -S | FileCheck %s
; RUN: opt < %s -data-layout="E-p:32:32" -passes=debugify,sccp -S | FileCheck %s
; RUN: opt < %s -data-layout="E-p:32:32" -passes=debugify,ipsccp -S | FileCheck %s


@X = constant i32 42		; <ptr> [#uses=1]
@Y = constant [2 x { i32, float }] [ { i32, float } { i32 12, float 1.000000e+00 }, { i32, float } { i32 37, float 0x3FF3B2FEC0000000 } ]		; <ptr> [#uses=2]

define i32 @test1() {
; CHECK-LABEL: @test1(
; CHECK-NEXT: #dbg_value(i32 42
; CHECK-NEXT: ret
	%B = load i32, ptr @X		; <i32> [#uses=1]
	ret i32 %B
}

define float @test2() {
; CHECK-LABEL: @test2(
; CHECK-NEXT: #dbg_value(ptr getelementptr
; CHECK-NEXT: #dbg_value(float 1.231200e+00
; CHECK-NEXT: ret
	%A = getelementptr [2 x { i32, float }], ptr @Y, i64 0, i64 1, i32 1		; <ptr> [#uses=1]
	%B = load float, ptr %A		; <float> [#uses=1]
	ret float %B
}

define i32 @test3() {
; CHECK-LABEL: @test3(
; CHECK-NEXT: #dbg_value(i32 12
; CHECK-NEXT: ret
	%B = load i32, ptr @Y
	ret i32 %B
}

define i8 @test4() {
; CHECK-LABEL: @test4(
; CHECK-NEXT: #dbg_value(i8
; CHECK-NEXT: ret
	%B = load i8, ptr @X
	ret i8 %B
}