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