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7d3268d25e
Following a suggestion by Sanjay, we should lower: %shl = shl i32 1, %y %and = and i32 %x, %shl %cmp = icmp eq i32 %and, %shl ret i1 %cmp into: subfic r4, r4, 32 rlwnm r3, r3, r4, 31, 31 Add this pattern and some associated patterns for the 64-bit case and the not-equal case. Fixes PR27356. llvm-svn: 280454
55 lines
1.3 KiB
LLVM
55 lines
1.3 KiB
LLVM
; RUN: llc < %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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define i1 @and_cmp_variable_power_of_two(i32 %x, i32 %y) {
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%shl = shl i32 1, %y
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%and = and i32 %x, %shl
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%cmp = icmp eq i32 %and, %shl
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ret i1 %cmp
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; CHECK-LABEL: @and_cmp_variable_power_of_two
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; CHECK: subfic 4, 4, 32
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; CHECK: rlwnm 3, 3, 4, 31, 31
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; CHECK: blr
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}
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define i1 @and_cmp_variable_power_of_two_64(i64 %x, i64 %y) {
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%shl = shl i64 1, %y
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%and = and i64 %x, %shl
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%cmp = icmp eq i64 %and, %shl
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ret i1 %cmp
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; CHECK-LABEL: @and_cmp_variable_power_of_two_64
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; CHECK: subfic 4, 4, 64
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; CHECK: rldcl 3, 3, 4, 63
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; CHECK: blr
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}
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define i1 @and_ncmp_variable_power_of_two(i32 %x, i32 %y) {
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%shl = shl i32 1, %y
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%and = and i32 %x, %shl
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%cmp = icmp ne i32 %and, %shl
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ret i1 %cmp
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; CHECK-LABEL: @and_ncmp_variable_power_of_two
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; CHECK-DAG: subfic 4, 4, 32
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; CHECK-DAG: nor [[REG:[0-9]+]], 3, 3
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; CHECK: rlwnm 3, [[REG]], 4, 31, 31
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; CHECK: blr
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}
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define i1 @and_ncmp_variable_power_of_two_64(i64 %x, i64 %y) {
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%shl = shl i64 1, %y
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%and = and i64 %x, %shl
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%cmp = icmp ne i64 %and, %shl
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ret i1 %cmp
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; CHECK-LABEL: @and_ncmp_variable_power_of_two_64
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; CHECK-DAG: subfic 4, 4, 64
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; CHECK-DAG: not [[REG:[0-9]+]], 3
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; CHECK: rldcl 3, [[REG]], 4, 63
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; CHECK: blr
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}
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