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0c8ea793c0
Add Word rotates to the list of instructions that are zero extending. This allows them to be used in dot form to compare with zero. llvm-svn: 264183
58 lines
1.3 KiB
LLVM
58 lines
1.3 KiB
LLVM
; RUN: llc -O2 < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-n32:64"
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target triple = "powerpc64le-unknown-linux-gnu"
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; CHECK-LABEL: test1
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define i8 @test1(i32 %a) {
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entry:
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; CHECK-NOT: rlwinm {{{[0-9]+}}}, {{[0-9]+}}, 0, 24, 27
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; CHECK: rlwinm. [[REG:[0-9]+]], {{[0-9]+}}, 0, 24, 27
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; CHECK-NOT: cmplwi [[REG]], 0
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; CHECK: beq 0
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%0 = and i32 %a, 240
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%1 = icmp eq i32 %0, 0
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br i1 %1, label %eq0, label %neq0
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eq0:
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ret i8 102
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neq0:
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ret i8 116
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}
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; CHECK-LABEL: test2
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define i8 @test2(i32 %a) {
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entry:
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; CHECK: rlwinm [[REG:[0-9]+]], {{[0-9]+}}, 0, 28, 23
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; CHECK: cmplwi [[REG]], 0
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; CHECK: beq 0
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%0 = and i32 %a, -241
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%1 = icmp eq i32 %0, 0
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br i1 %1, label %eq0, label %neq0
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eq0:
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ret i8 102
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neq0:
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ret i8 116
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}
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declare {i32, i1} @llvm.ssub.with.overflow.i32(i32 %a, i32 %b)
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; CHECK-LABEL: test3
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define i8 @test3(i32 %a, i32 %b) {
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entry:
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; CHECK-NOT: rlwnm {{{[0-9]+}}}, {{[0-9]+}}, {{{[0-9]+}}}, 28, 31
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; CHECK: rlwnm. [[REG:[0-9]+]], {{[0-9]+}}, 4, 28, 31
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; CHECK-NOT: cmplwi [[REG]], 0
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; CHECK: beq 0
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%left = shl i32 %a, %b
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%res = call {i32, i1} @llvm.ssub.with.overflow.i32(i32 32, i32 %b)
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%right_amount = extractvalue {i32, i1} %res, 0
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%right = lshr i32 %a, %right_amount
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%0 = or i32 %left, %right
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%1 = and i32 %0, 15
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%2 = icmp eq i32 %1, 0
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br i1 %2, label %eq0, label %neq0
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eq0:
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ret i8 102
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neq0:
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ret i8 116
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}
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