Jiri Slaby
a9dc652101
OBS-URL: https://build.opensuse.org/package/show/devel:tools:statica/klee?expand=0&rev=102
131 lines
5.6 KiB
Diff
131 lines
5.6 KiB
Diff
From: Lukas Zaoral <lzaoral@redhat.com>
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Date: Thu, 27 May 2021 21:20:58 +0200
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Subject: llvm12: Implement llvm.{s,u}{max,min} intrinsics
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Git-repo: https://github.com/lzaoral/klee.git
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Git-commit: a34fb8961649bf3a065ec8f0eb4bc58715fd1d57
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Patch-mainline: pr#1389
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References: LLVM 12
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The vector variants are not implemented at the moment.
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See: https://reviews.llvm.org/D84125
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Signed-off-by: Jiri Slaby <jslaby@suse.cz>
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---
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lib/Module/IntrinsicCleaner.cpp | 35 ++++++++++++++++++++
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test/Intrinsics/MinMax.ll | 57 +++++++++++++++++++++++++++++++++
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2 files changed, 92 insertions(+)
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create mode 100644 test/Intrinsics/MinMax.ll
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diff --git a/lib/Module/IntrinsicCleaner.cpp b/lib/Module/IntrinsicCleaner.cpp
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index eaec7722..a4bb4ee8 100644
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--- a/lib/Module/IntrinsicCleaner.cpp
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+++ b/lib/Module/IntrinsicCleaner.cpp
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@@ -345,6 +345,41 @@ bool IntrinsicCleanerPass::runOnBasicBlock(BasicBlock &b, Module &M) {
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}
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#endif
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+#if LLVM_VERSION_CODE >= LLVM_VERSION(12, 0)
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+ case Intrinsic::smax:
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+ case Intrinsic::smin:
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+ case Intrinsic::umax:
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+ case Intrinsic::umin: {
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+ IRBuilder<> builder(ii);
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+ assert(ii->getNumArgOperands() == 2 && "wrong number of arguments");
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+
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+ Value *op1 = ii->getArgOperand(0);
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+ Value *op2 = ii->getArgOperand(1);
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+
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+ assert(op1->getType() == op2->getType() && "operand type mismatch");
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+
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+ // TODO: vectors
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+ assert(!isa<VectorType>(op1->getType()) &&
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+ "llvm.{s,u}{max,min} with vectors is not supported");
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+
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+ Value *condition = nullptr;
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+ if (ii->getIntrinsicID() == Intrinsic::smax)
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+ condition = builder.CreateICmpSGT(op1, op2);
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+ else if (ii->getIntrinsicID() == Intrinsic::smin)
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+ condition = builder.CreateICmpSLT(op1, op2);
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+ else if (ii->getIntrinsicID() == Intrinsic::umax)
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+ condition = builder.CreateICmpUGT(op1, op2);
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+ else // (ii->getIntrinsicID() == Intrinsic::umin)
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+ condition = builder.CreateICmpULT(op1, op2);
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+
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+ Value *result = builder.CreateSelect(condition, op1, op2);
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+ ii->replaceAllUsesWith(result);
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+ ii->eraseFromParent();
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+ dirty = true;
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+ break;
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+ }
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+#endif
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+
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// The following intrinsics are currently handled by LowerIntrinsicCall
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// (Invoking LowerIntrinsicCall with any intrinsics not on this
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// list throws an exception.)
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diff --git a/test/Intrinsics/MinMax.ll b/test/Intrinsics/MinMax.ll
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new file mode 100644
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index 00000000..429fb1f2
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--- /dev/null
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+++ b/test/Intrinsics/MinMax.ll
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@@ -0,0 +1,57 @@
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+; REQUIRES: geq-llvm-12.0
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+; RUN: %llvmas %s -o=%t.bc
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+; RUN: rm -rf %t.klee-out
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+; RUN: %klee -exit-on-error --output-dir=%t.klee-out --optimize=false %t.bc | \
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+; RUN: FileCheck %s
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+; ModuleID = 'MinMax.ll'
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+source_filename = "MinMax.c"
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+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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+target triple = "x86_64-unknown-linux-gnu"
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+
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+@0 = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1
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+@1 = private unnamed_addr constant [4 x i8] c"%u\0A\00", align 1
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+
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+; Function Attrs: nofree nounwind uwtable
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+define dso_local i32 @main() local_unnamed_addr #0 {
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+ ; smax
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+ %1 = call i32 @llvm.smax.i32(i32 -10, i32 10)
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+ %2 = call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @0, i64 0, i64 0), i32 %1)
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+ ; CHECK: 10
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+ ; smin
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+ %3 = call i32 @llvm.smin.i32(i32 -10, i32 %2)
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+ %4 = call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @0, i64 0, i64 0), i32 %3)
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+ ; CHECK: -10
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+ ; smin
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+ %5 = call i32 @llvm.umax.i32(i32 %2, i32 20)
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+ %6 = call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @1, i64 0, i64 0), i32 %5)
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+ ; CHECK: 20
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+ ; smin
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+ %7 = call i32 @llvm.umin.i32(i32 10, i32 %5)
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+ %8 = call i32 (i8*, ...) @printf(i8* nonnull dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @1, i64 0, i64 0), i32 %7)
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+ ; CHECK: 10
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+ ret i32 0
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+}
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+
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+; Function Attrs: nofree nounwind
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+declare dso_local noundef i32 @printf(i8* nocapture noundef readonly, ...) local_unnamed_addr #1
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+
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+; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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+declare i32 @llvm.smax.i32(i32, i32) #2
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+
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+; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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+declare i32 @llvm.smin.i32(i32, i32) #2
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+
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+; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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+declare i32 @llvm.umax.i32(i32, i32) #2
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+
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+; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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+declare i32 @llvm.umin.i32(i32, i32) #2
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+
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+attributes #0 = { nofree nounwind uwtable "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" }
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+attributes #1 = { nofree nounwind "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" }
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+attributes #2 = { nofree nosync nounwind readnone speculatable willreturn }
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+
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+!0 = !{!1, !1, i64 0}
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+!1 = !{!"int", !2, i64 0}
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+!2 = !{!"omnipotent char", !3, i64 0}
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+!3 = !{!"Simple C/C++ TBAA"}
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--
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2.26.2
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