From 2c3d199fbfaa51f12a82d30c6b07f92acf470e15 Mon Sep 17 00:00:00 2001 From: Sanjay Patel Date: Sat, 19 Sep 2020 10:43:18 -0400 Subject: [PATCH] [InstCombine] regenerate test checks; NFC --- .../Transforms/InstCombine/zext-or-icmp.ll | 43 +++++++++++-------- 1 file changed, 25 insertions(+), 18 deletions(-) diff --git a/llvm/test/Transforms/InstCombine/zext-or-icmp.ll b/llvm/test/Transforms/InstCombine/zext-or-icmp.ll index 973c5a53abac..8223479c8134 100644 --- a/llvm/test/Transforms/InstCombine/zext-or-icmp.ll +++ b/llvm/test/Transforms/InstCombine/zext-or-icmp.ll @@ -1,28 +1,45 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt < %s -instcombine -S | FileCheck %s ; Remove an icmp by using its operand in the subsequent logic directly. define i8 @zext_or_icmp_icmp(i8 %a, i8 %b) { +; CHECK-LABEL: @zext_or_icmp_icmp( +; CHECK-NEXT: [[MASK:%.*]] = and i8 [[A:%.*]], 1 +; CHECK-NEXT: [[TOBOOL2:%.*]] = icmp eq i8 [[B:%.*]], 0 +; CHECK-NEXT: [[TOBOOL22:%.*]] = zext i1 [[TOBOOL2]] to i8 +; CHECK-NEXT: [[TMP1:%.*]] = xor i8 [[MASK]], 1 +; CHECK-NEXT: [[ZEXT3:%.*]] = or i8 [[TMP1]], [[TOBOOL22]] +; CHECK-NEXT: ret i8 [[ZEXT3]] +; %mask = and i8 %a, 1 %toBool1 = icmp eq i8 %mask, 0 %toBool2 = icmp eq i8 %b, 0 %bothCond = or i1 %toBool1, %toBool2 %zext = zext i1 %bothCond to i8 ret i8 %zext - -; CHECK-LABEL: zext_or_icmp_icmp( -; CHECK-NEXT: %mask = and i8 %a, 1 -; CHECK-NEXT: %toBool2 = icmp eq i8 %b, 0 -; CHECK-NEXT: %toBool22 = zext i1 %toBool2 to i8 -; CHECK-NEXT: %1 = xor i8 %mask, 1 -; CHECK-NEXT: %zext3 = or i8 %1, %toBool22 -; CHECK-NEXT: ret i8 %zext } ; Here, widening the or from i1 to i32 and removing one of the icmps would ; widen an undef value (created by the out-of-range shift), increasing the ; range of valid values for the return, so we can't do it. + define i32 @dont_widen_undef() { +; CHECK-LABEL: @dont_widen_undef( +; CHECK-NEXT: entry: +; CHECK-NEXT: br label [[BLOCK2:%.*]] +; CHECK: block1: +; CHECK-NEXT: br label [[BLOCK2]] +; CHECK: block2: +; CHECK-NEXT: [[CMP_I:%.*]] = phi i1 [ false, [[BLOCK1:%.*]] ], [ true, [[ENTRY:%.*]] ] +; CHECK-NEXT: [[M_011:%.*]] = phi i32 [ 0, [[BLOCK1]] ], [ 33, [[ENTRY]] ] +; CHECK-NEXT: [[M_1_OP:%.*]] = lshr i32 1, [[M_011]] +; CHECK-NEXT: [[SEXT_MASK:%.*]] = and i32 [[M_1_OP]], 65535 +; CHECK-NEXT: [[CMP115:%.*]] = icmp ne i32 [[SEXT_MASK]], 0 +; CHECK-NEXT: [[CMP1:%.*]] = or i1 [[CMP_I]], [[CMP115]] +; CHECK-NEXT: [[CONV2:%.*]] = zext i1 [[CMP1]] to i32 +; CHECK-NEXT: ret i32 [[CONV2]] +; entry: br label %block2 @@ -38,14 +55,4 @@ block2: %cmp1 = or i1 %cmp.i, %cmp115 %conv2 = zext i1 %cmp1 to i32 ret i32 %conv2 - -; CHECK-LABEL: dont_widen_undef( -; CHECK: %cmp.i = phi i1 [ false, %block1 ], [ true, %entry ] -; CHECK-NEXT: %m.011 = phi i32 [ 0, %block1 ], [ 33, %entry ] -; CHECK-NEXT: %m.1.op = lshr i32 1, %m.011 -; CHECK-NEXT: %sext.mask = and i32 %m.1.op, 65535 -; CHECK-NEXT: %cmp115 = icmp ne i32 %sext.mask, 0 -; CHECK-NEXT: %cmp1 = or i1 %cmp.i, %cmp115 -; CHECK-NEXT: %conv2 = zext i1 %cmp1 to i32 -; CHECK-NEXT: ret i32 %conv2 }