77 lines
2.2 KiB
LLVM
77 lines
2.2 KiB
LLVM
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; Test SELFHR.
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; See comments in asm-18.ll about testing high-word operations.
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;
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; RUN: llc < %s -verify-machineinstrs -mtriple=s390x-linux-gnu -mcpu=z15 \
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; RUN: -no-integrated-as | FileCheck %s
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define void @f1(i32 %limit) {
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; CHECK-LABEL: f1:
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; CHECK-DAG: stepa [[REG1:%r[0-5]]]
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; CHECK-DAG: stepb [[REG2:%r[0-5]]]
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; CHECK-DAG: clfi %r2, 42
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; CHECK: selfhrl [[REG3:%r[0-5]]], [[REG1]], [[REG2]]
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; CHECK: stepc [[REG3]]
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; CHECK: br %r14
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%a = call i32 asm sideeffect "stepa $0", "=h"()
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%b = call i32 asm sideeffect "stepb $0", "=h"()
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%cond = icmp ult i32 %limit, 42
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%res = select i1 %cond, i32 %a, i32 %b
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call void asm sideeffect "stepc $0", "h"(i32 %res)
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call void asm sideeffect "use $0", "h"(i32 %a)
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call void asm sideeffect "use $0", "h"(i32 %b)
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ret void
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}
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; Check that we also get SELFHR as a result of early if-conversion.
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define void @f2(i32 %limit) {
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; CHECK-LABEL: f2:
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; CHECK-DAG: stepa [[REG1:%r[0-5]]]
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; CHECK-DAG: stepb [[REG2:%r[0-5]]]
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; CHECK-DAG: clfi %r2, 41
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; CHECK: selfhrh [[REG3:%r[0-5]]], [[REG2]], [[REG1]]
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; CHECK: stepc [[REG3]]
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; CHECK: br %r14
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entry:
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%a = call i32 asm sideeffect "stepa $0", "=h"()
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%b = call i32 asm sideeffect "stepb $0", "=h"()
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%cond = icmp ult i32 %limit, 42
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br i1 %cond, label %if.then, label %return
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if.then:
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br label %return
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return:
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%res = phi i32 [ %a, %if.then ], [ %b, %entry ]
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call void asm sideeffect "stepc $0", "h"(i32 %res)
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call void asm sideeffect "use $0", "h"(i32 %a)
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call void asm sideeffect "use $0", "h"(i32 %b)
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ret void
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}
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; Check that inverting the condition works as well.
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define void @f3(i32 %limit) {
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; CHECK-LABEL: f3:
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; CHECK-DAG: stepa [[REG1:%r[0-5]]]
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; CHECK-DAG: stepb [[REG2:%r[0-5]]]
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; CHECK-DAG: clfi %r2, 41
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; CHECK: selfhrh [[REG3:%r[0-5]]], [[REG1]], [[REG2]]
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; CHECK: stepc [[REG3]]
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; CHECK: br %r14
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entry:
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%a = call i32 asm sideeffect "stepa $0", "=h"()
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%b = call i32 asm sideeffect "stepb $0", "=h"()
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%cond = icmp ult i32 %limit, 42
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br i1 %cond, label %if.then, label %return
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if.then:
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br label %return
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return:
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%res = phi i32 [ %b, %if.then ], [ %a, %entry ]
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call void asm sideeffect "stepc $0", "h"(i32 %res)
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call void asm sideeffect "use $0", "h"(i32 %a)
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call void asm sideeffect "use $0", "h"(i32 %b)
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ret void
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}
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