| ; Test 64-bit comparisons in which the second operand is sign-extended |
| ; from a PC-relative i16. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| @g = dso_local global i16 1 |
| @h = dso_local global i16 1, align 1, section "foo" |
| |
| ; Check signed comparison. |
| define dso_local i64 @f1(i64 %src1) { |
| ; CHECK-LABEL: f1: |
| ; CHECK: cghrl %r2, g |
| ; CHECK-NEXT: blr %r14 |
| ; CHECK: br %r14 |
| entry: |
| %val = load i16, ptr@g |
| %src2 = sext i16 %val to i64 |
| %cond = icmp slt i64 %src1, %src2 |
| br i1 %cond, label %exit, label %mulb |
| mulb: |
| %mul = mul i64 %src1, %src1 |
| br label %exit |
| exit: |
| %res = phi i64 [ %src1, %entry ], [ %mul, %mulb ] |
| ret i64 %res |
| } |
| |
| ; Check unsigned comparison, which cannot use CHRL. |
| define dso_local i64 @f2(i64 %src1) { |
| ; CHECK-LABEL: f2: |
| ; CHECK-NOT: cghrl |
| ; CHECK: br %r14 |
| entry: |
| %val = load i16, ptr@g |
| %src2 = sext i16 %val to i64 |
| %cond = icmp ult i64 %src1, %src2 |
| br i1 %cond, label %exit, label %mulb |
| mulb: |
| %mul = mul i64 %src1, %src1 |
| br label %exit |
| exit: |
| %res = phi i64 [ %src1, %entry ], [ %mul, %mulb ] |
| ret i64 %res |
| } |
| |
| ; Check equality. |
| define dso_local i64 @f3(i64 %src1) { |
| ; CHECK-LABEL: f3: |
| ; CHECK: cghrl %r2, g |
| ; CHECK-NEXT: ber %r14 |
| ; CHECK: br %r14 |
| entry: |
| %val = load i16, ptr@g |
| %src2 = sext i16 %val to i64 |
| %cond = icmp eq i64 %src1, %src2 |
| br i1 %cond, label %exit, label %mulb |
| mulb: |
| %mul = mul i64 %src1, %src1 |
| br label %exit |
| exit: |
| %res = phi i64 [ %src1, %entry ], [ %mul, %mulb ] |
| ret i64 %res |
| } |
| |
| ; Check inequality. |
| define dso_local i64 @f4(i64 %src1) { |
| ; CHECK-LABEL: f4: |
| ; CHECK: cghrl %r2, g |
| ; CHECK-NEXT: blhr %r14 |
| ; CHECK: br %r14 |
| entry: |
| %val = load i16, ptr@g |
| %src2 = sext i16 %val to i64 |
| %cond = icmp ne i64 %src1, %src2 |
| br i1 %cond, label %exit, label %mulb |
| mulb: |
| %mul = mul i64 %src1, %src1 |
| br label %exit |
| exit: |
| %res = phi i64 [ %src1, %entry ], [ %mul, %mulb ] |
| ret i64 %res |
| } |
| |
| ; Repeat f1 with an unaligned address. |
| define dso_local i64 @f5(i64 %src1) { |
| ; CHECK-LABEL: f5: |
| ; CHECK: lgrl [[REG:%r[0-5]]], h@GOT |
| ; CHECK: cgh %r2, 0([[REG]]) |
| ; CHECK-NEXT: blr %r14 |
| ; CHECK: br %r14 |
| entry: |
| %val = load i16, ptr@h, align 1 |
| %src2 = sext i16 %val to i64 |
| %cond = icmp slt i64 %src1, %src2 |
| br i1 %cond, label %exit, label %mulb |
| mulb: |
| %mul = mul i64 %src1, %src1 |
| br label %exit |
| exit: |
| %res = phi i64 [ %src1, %entry ], [ %mul, %mulb ] |
| ret i64 %res |
| } |
| |
| ; Check the comparison can be reversed if that allows CGHRL to be used. |
| define dso_local i64 @f6(i64 %src2) { |
| ; CHECK-LABEL: f6: |
| ; CHECK: cghrl %r2, g |
| ; CHECK-NEXT: bhr %r14 |
| ; CHECK: br %r14 |
| entry: |
| %val = load i16, ptr@g |
| %src1 = sext i16 %val to i64 |
| %cond = icmp slt i64 %src1, %src2 |
| br i1 %cond, label %exit, label %mulb |
| mulb: |
| %mul = mul i64 %src2, %src2 |
| br label %exit |
| exit: |
| %res = phi i64 [ %src2, %entry ], [ %mul, %mulb ] |
| ret i64 %res |
| } |