e22ebeab1a
In the past while, I've committed a number of patches in the PowerPC back end aimed at eliminating comparison instructions. However, this causes some failures in proprietary source and these issues are not observed in SPEC or any open source packages I've been able to run. As a result, I'm pulling the entire series and will refactor it to: - Have a single entry point for easy control - Have fine-grained control over which patterns we transform A side-effect of this is that test cases for these patches (and modified by them) are XFAIL-ed. This is a temporary measure as it is counter-productive to remove/modify these test cases and then have to modify them again when the refactored patch is recommitted. The failure will be investigated in parallel to the refactoring effort and the recommit will either have a fix for it or will leave this transformation off by default until the problem is resolved. llvm-svn: 314244
54 lines
2.0 KiB
LLVM
54 lines
2.0 KiB
LLVM
; XFAIL: *
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -O2 \
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; RUN: -ppc-asm-full-reg-names -mcpu=pwr8 < %s | FileCheck %s \
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; RUN: --implicit-check-not cmpw --implicit-check-not cmpd --implicit-check-not cmpl
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -O2 \
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; RUN: -ppc-asm-full-reg-names -mcpu=pwr8 < %s | FileCheck %s \
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; RUN: --implicit-check-not cmpw --implicit-check-not cmpd --implicit-check-not cmpl
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%struct.tree_common = type { i8, [3 x i8] }
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declare signext i32 @fn2(...) local_unnamed_addr #1
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; Function Attrs: nounwind
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define i32 @testCompare1(%struct.tree_common* nocapture readonly %arg1) {
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; CHECK-LABEL: testCompare1:
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; CHECK: # BB#0: # %entry
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; CHECK: lbz r3, 0(r3)
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; CHECK-DAG: clrlwi r3, r3, 31
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; CHECK-DAG: clrldi r3, r3, 32
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; CHECK: lbz r4, 0(r4)
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; CHECK-DAG: clrlwi r4, r4, 31
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; CHECK-DAG: clrldi r4, r4, 32
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; CHECK: sub r3, r3, r4
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; CHECK-NEXT: rldicl r3, r3, 1, 63
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entry:
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%bf.load = load i8, i8* bitcast (i32 (%struct.tree_common*)* @testCompare1 to i8*), align 4
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%bf.clear = and i8 %bf.load, 1
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%0 = getelementptr inbounds %struct.tree_common, %struct.tree_common* %arg1, i64 0, i32 0
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%bf.load1 = load i8, i8* %0, align 4
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%bf.clear2 = and i8 %bf.load1, 1
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%cmp = icmp ugt i8 %bf.clear, %bf.clear2
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%conv = zext i1 %cmp to i32
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%call = tail call signext i32 bitcast (i32 (...)* @fn2 to i32 (i32)*)(i32 signext %conv) #2
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ret i32 undef
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}
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; Function Attrs: norecurse nounwind readnone
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define signext i32 @testCompare2(i32 zeroext %a, i32 zeroext %b) {
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; CHECK-LABEL: testCompare2:
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; CHECK: # BB#0: # %entry
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; CHECK-DAG: rlwinm r3, r3, 0, 31, 31
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; CHECK-DAG: rlwinm r4, r4, 0, 31, 31
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; CHECK-DAG: clrldi r3, r3, 32
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; CHECK-DAG: clrldi r4, r4, 32
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; CHECK: sub r3, r4, r3
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; CHECK-NEXT: rldicl r3, r3, 1, 63
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; CHECK-NEXT: blr
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entry:
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%and = and i32 %a, 1
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%and1 = and i32 %b, 1
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%cmp = icmp ugt i32 %and, %and1
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%conv = zext i1 %cmp to i32
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ret i32 %conv
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}
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