derek.holloway
7502bf64a4
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65 lines
2.0 KiB
LLVM
65 lines
2.0 KiB
LLVM
; RUN: opt -S -passes=instcombine < %s | FileCheck %s
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target triple = "x86_64-apple-macosx10.6.6"
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define zeroext i16 @foo1(i32 %on_off) {
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; CHECK-LABEL: @foo1(
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; CHECK-NEXT: [[ON_OFF_TR:%.*]] = trunc i32 %on_off to i16
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; CHECK-NEXT: [[TMP1:%.*]] = shl i16 [[ON_OFF_TR]], 1
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; CHECK-NEXT: [[CONV:%.*]] = add i16 [[TMP1]], -2
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; CHECK-NEXT: ret i16 [[CONV]]
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;
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%on_off.addr = alloca i32, align 4
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%a = alloca i32, align 4
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store i32 %on_off, ptr %on_off.addr, align 4
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%tmp = load i32, ptr %on_off.addr, align 4
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%sub = sub i32 1, %tmp
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%mul = mul i32 %sub, -2
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store i32 %mul, ptr %a, align 4
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%tmp1 = load i32, ptr %a, align 4
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%conv = trunc i32 %tmp1 to i16
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ret i16 %conv
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}
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define zeroext i16 @foo2(i32 %on_off, i32 %q) {
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; CHECK-LABEL: @foo2(
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; CHECK-NEXT: [[SUBA:%.*]] = sub i32 %on_off, %q
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; CHECK-NEXT: [[SUBA_TR:%.*]] = trunc i32 [[SUBA]] to i16
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; CHECK-NEXT: [[CONV:%.*]] = shl i16 [[SUBA_TR]], 2
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; CHECK-NEXT: ret i16 [[CONV]]
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;
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%on_off.addr = alloca i32, align 4
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%q.addr = alloca i32, align 4
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%a = alloca i32, align 4
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store i32 %on_off, ptr %on_off.addr, align 4
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store i32 %q, ptr %q.addr, align 4
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%tmp = load i32, ptr %q.addr, align 4
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%tmp1 = load i32, ptr %on_off.addr, align 4
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%sub = sub i32 %tmp, %tmp1
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%mul = mul i32 %sub, -4
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store i32 %mul, ptr %a, align 4
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%tmp2 = load i32, ptr %a, align 4
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%conv = trunc i32 %tmp2 to i16
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ret i16 %conv
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}
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define zeroext i16 @foo3(i32 %on_off) {
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; CHECK-LABEL: @foo3(
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; CHECK-NEXT: [[ON_OFF_TR:%.*]] = trunc i32 %on_off to i16
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; CHECK-NEXT: [[TMP1:%.*]] = shl i16 [[ON_OFF_TR]], 2
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; CHECK-NEXT: [[CONV:%.*]] = add i16 [[TMP1]], -28
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; CHECK-NEXT: ret i16 [[CONV]]
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;
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%on_off.addr = alloca i32, align 4
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%a = alloca i32, align 4
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store i32 %on_off, ptr %on_off.addr, align 4
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%tmp = load i32, ptr %on_off.addr, align 4
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%sub = sub i32 7, %tmp
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%mul = mul i32 %sub, -4
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store i32 %mul, ptr %a, align 4
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%tmp1 = load i32, ptr %a, align 4
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%conv = trunc i32 %tmp1 to i16
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ret i16 %conv
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}
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