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b667d698ac
The size savings are significant, and from what I can tell, both ICC and GCC do this. Differential Revision: http://reviews.llvm.org/D18573 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264966 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.6 KiB
LLVM
51 lines
1.6 KiB
LLVM
; RUN: llc %s -o - | FileCheck %s
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32-S128"
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target triple = "i386-apple-macosx10.8.0"
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declare {i64, i1} @llvm.umul.with.overflow.i64(i64, i64) nounwind readnone
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declare i32 @printf(i8*, ...)
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@.str = private unnamed_addr constant [10 x i8] c"%llx, %d\0A\00", align 1
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define i32 @t1() nounwind {
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; CHECK-LABEL: t1:
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; CHECK: pushl $0
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; CHECK: pushl $0
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; CHECK: pushl $72
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%1 = call {i64, i1} @llvm.umul.with.overflow.i64(i64 9, i64 8)
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%2 = extractvalue {i64, i1} %1, 0
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%3 = extractvalue {i64, i1} %1, 1
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%4 = zext i1 %3 to i32
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%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i32 0, i32 0), i64 %2, i32 %4)
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ret i32 0
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}
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define i32 @t2() nounwind {
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; CHECK-LABEL: t2:
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; CHECK: pushl $0
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; CHECK: pushl $0
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; CHECK: pushl $0
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%1 = call {i64, i1} @llvm.umul.with.overflow.i64(i64 9, i64 0)
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%2 = extractvalue {i64, i1} %1, 0
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%3 = extractvalue {i64, i1} %1, 1
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%4 = zext i1 %3 to i32
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%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i32 0, i32 0), i64 %2, i32 %4)
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ret i32 0
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}
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define i32 @t3() nounwind {
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; CHECK-LABEL: t3:
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; CHECK: pushl $1
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; CHECK: pushl $-1
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; CHECK: pushl $-9
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%1 = call {i64, i1} @llvm.umul.with.overflow.i64(i64 9, i64 -1)
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%2 = extractvalue {i64, i1} %1, 0
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%3 = extractvalue {i64, i1} %1, 1
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%4 = zext i1 %3 to i32
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%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i32 0, i32 0), i64 %2, i32 %4)
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ret i32 0
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}
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