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[test] Add a set of test for constant folding deopt operands with CVP
For anyone curious, the first test example is illustrative of a real code idiom produced by branching on the result of a three way comparison. llvm-svn: 348997
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Philip Reames
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142
test/Transforms/CorrelatedValuePropagation/deopt.ll
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142
test/Transforms/CorrelatedValuePropagation/deopt.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -correlated-propagation -S < %s | FileCheck %s
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declare void @use()
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; test requires a mix of context sensative refinement, and analysis
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; of the originating IR pattern. Neither part is enough in isolation.
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define void @test1(i1 %c, i1 %c2) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C:%.*]], i64 -1, i64 1
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; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[C2:%.*]], i64 [[SEL]], i64 0
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i64 [[SEL2]], 0
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; CHECK-NEXT: br i1 [[CMP]], label [[TAKEN:%.*]], label [[UNTAKEN:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: call void @use() [ "deopt"(i64 [[SEL2]]) ]
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; CHECK-NEXT: ret void
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; CHECK: untaken:
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; CHECK-NEXT: ret void
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;
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%sel = select i1 %c, i64 -1, i64 1
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%sel2 = select i1 %c2, i64 %sel, i64 0
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%cmp = icmp sgt i64 %sel2, 0
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br i1 %cmp, label %taken, label %untaken
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taken:
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call void @use() ["deopt" (i64 %sel2)]
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ret void
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untaken:
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ret void
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}
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declare void @llvm.assume(i1)
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declare void @llvm.experimental.guard(i1,...)
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; Same as test1, but with assume not branch
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define void @test1_assume(i1 %c, i1 %c2) {
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; CHECK-LABEL: @test1_assume(
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C:%.*]], i64 -1, i64 1
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; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[C2:%.*]], i64 [[SEL]], i64 0
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i64 [[SEL2]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: call void @use() [ "deopt"(i64 [[SEL2]]) ]
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; CHECK-NEXT: ret void
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;
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%sel = select i1 %c, i64 -1, i64 1
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%sel2 = select i1 %c2, i64 %sel, i64 0
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%cmp = icmp sgt i64 %sel2, 0
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call void @llvm.assume(i1 %cmp)
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call void @use() ["deopt" (i64 %sel2)]
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ret void
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}
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; Same as test1, but with guard not branch
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define void @test1_guard(i1 %c, i1 %c2) {
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; CHECK-LABEL: @test1_guard(
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C:%.*]], i64 -1, i64 1
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; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[C2:%.*]], i64 [[SEL]], i64 0
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i64 [[SEL2]], 0
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[CMP]]) [ "deopt"(i64 [[SEL2]]) ]
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; CHECK-NEXT: call void @use() [ "deopt"(i64 [[SEL2]]) ]
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; CHECK-NEXT: ret void
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;
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%sel = select i1 %c, i64 -1, i64 1
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%sel2 = select i1 %c2, i64 %sel, i64 0
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%cmp = icmp sgt i64 %sel2, 0
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call void (i1, ...) @llvm.experimental.guard(i1 %cmp) ["deopt" (i64 %sel2)]
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call void @use() ["deopt" (i64 %sel2)]
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ret void
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}
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;; The rest of these are slight variations on the patterns
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;; producing 1 of several adjacent constants to test generality
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define void @test2(i1 %c, i1 %c2) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C:%.*]], i64 0, i64 1
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; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[C2:%.*]], i64 [[SEL]], i64 -1
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i64 [[SEL2]], 0
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; CHECK-NEXT: br i1 [[CMP]], label [[TAKEN:%.*]], label [[UNTAKEN:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: call void @use() [ "deopt"(i64 [[SEL2]]) ]
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; CHECK-NEXT: ret void
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; CHECK: untaken:
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; CHECK-NEXT: ret void
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;
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%sel = select i1 %c, i64 0, i64 1
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%sel2 = select i1 %c2, i64 %sel, i64 -1
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%cmp = icmp sgt i64 %sel2, 0
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br i1 %cmp, label %taken, label %untaken
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taken:
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call void @use() ["deopt" (i64 %sel2)]
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ret void
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untaken:
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ret void
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}
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define void @test3(i1 %c, i1 %c2) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C:%.*]], i64 0, i64 1
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; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[C2:%.*]], i64 [[SEL]], i64 2
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i64 [[SEL2]], 1
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; CHECK-NEXT: br i1 [[CMP]], label [[TAKEN:%.*]], label [[UNTAKEN:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: call void @use() [ "deopt"(i64 [[SEL2]]) ]
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; CHECK-NEXT: ret void
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; CHECK: untaken:
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; CHECK-NEXT: ret void
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;
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%sel = select i1 %c, i64 0, i64 1
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%sel2 = select i1 %c2, i64 %sel, i64 2
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%cmp = icmp sgt i64 %sel2, 1
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br i1 %cmp, label %taken, label %untaken
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taken:
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call void @use() ["deopt" (i64 %sel2)]
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ret void
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untaken:
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ret void
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}
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define void @test4(i1 %c, i1 %c2) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C:%.*]], i64 0, i64 1
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; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[C2:%.*]], i64 0, i64 1
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; CHECK-NEXT: [[ADD1:%.*]] = add i64 0, [[SEL]]
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; CHECK-NEXT: [[ADD2:%.*]] = add i64 [[ADD1]], [[SEL2]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i64 [[ADD2]], 0
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; CHECK-NEXT: br i1 [[CMP]], label [[TAKEN:%.*]], label [[UNTAKEN:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: call void @use() [ "deopt"(i64 [[ADD2]]) ]
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; CHECK-NEXT: ret void
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; CHECK: untaken:
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; CHECK-NEXT: ret void
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;
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%sel = select i1 %c, i64 0, i64 1
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%sel2 = select i1 %c2, i64 0, i64 1
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%add1 = add i64 0, %sel
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%add2 = add i64 %add1, %sel2
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%cmp = icmp sgt i64 %add2, 0
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br i1 %cmp, label %taken, label %untaken
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taken:
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call void @use() ["deopt" (i64 %add2)]
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ret void
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untaken:
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ret void
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}
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