diff options
| -rw-r--r-- | lib/IR/ConstantFold.cpp | 4 | ||||
| -rw-r--r-- | test/Transforms/InstCombine/2010-03-03-ExtElim.ll | 20 |
2 files changed, 19 insertions, 5 deletions
diff --git a/lib/IR/ConstantFold.cpp b/lib/IR/ConstantFold.cpp index bf93d4f9566..da9762fa627 100644 --- a/lib/IR/ConstantFold.cpp +++ b/lib/IR/ConstantFold.cpp @@ -1857,9 +1857,9 @@ Constant *llvm::ConstantFoldCompareInstruction(unsigned short pred, if (CE1Inverse == CE1Op0) { // Check whether we can safely truncate the right hand side. Constant *C2Inverse = ConstantExpr::getTrunc(C2, CE1Op0->getType()); - if (ConstantExpr::getZExt(C2Inverse, C2->getType()) == C2) { + if (ConstantExpr::getCast(CE1->getOpcode(), C2Inverse, + C2->getType()) == C2) return ConstantExpr::getICmp(pred, CE1Inverse, C2Inverse); - } } } } diff --git a/test/Transforms/InstCombine/2010-03-03-ExtElim.ll b/test/Transforms/InstCombine/2010-03-03-ExtElim.ll index bb3159e1e6f..4b1930584c5 100644 --- a/test/Transforms/InstCombine/2010-03-03-ExtElim.ll +++ b/test/Transforms/InstCombine/2010-03-03-ExtElim.ll @@ -1,5 +1,4 @@ ; RUN: opt -instcombine -S < %s | FileCheck %s -; PR6486 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32" target triple = "i386-unknown-linux-gnu" @@ -7,8 +6,8 @@ target triple = "i386-unknown-linux-gnu" @g_92 = common global [2 x i32*] zeroinitializer, align 4 ; <[2 x i32*]*> [#uses=1] @g_177 = constant i32** bitcast (i8* getelementptr (i8* bitcast ([2 x i32*]* @g_92 to i8*), i64 4) to i32**), align 4 ; <i32***> [#uses=1] -define i1 @test() nounwind { -; CHECK: @test +define i1 @PR6486() nounwind { +; CHECK: @PR6486 %tmp = load i32*** @g_177 ; <i32**> [#uses=1] %cmp = icmp ne i32** null, %tmp ; <i1> [#uses=1] %conv = zext i1 %cmp to i32 ; <i32> [#uses=1] @@ -16,3 +15,18 @@ define i1 @test() nounwind { ret i1 %cmp1 ; CHECK: ret i1 true } + +@d = common global i32 0, align 4 +@a = common global [1 x i32] zeroinitializer, align 4 + +define i1 @PR16462_1() nounwind { +; CHECK: @PR16462_1 + ret i1 icmp sgt (i32 sext (i16 trunc (i32 select (i1 icmp eq (i32* getelementptr inbounds ([1 x i32]* @a, i32 0, i32 0), i32* @d), i32 0, i32 1) to i16) to i32), i32 65535) +; CHECK: ret i1 icmp sgt (i32 sext (i16 trunc (i32 select (i1 icmp eq (i32* getelementptr inbounds ([1 x i32]* @a, i32 0, i32 0), i32* @d), i32 0, i32 1) to i16) to i32), i32 65535) +} + +define i1 @PR16462_2() nounwind { +; CHECK: @PR16462_2 + ret i1 icmp sgt (i32 sext (i16 trunc (i32 select (i1 icmp eq (i32* getelementptr inbounds ([1 x i32]* @a, i32 0, i32 0), i32* @d), i32 0, i32 1) to i16) to i32), i32 42) +; CHECK: ret i1 icmp sgt (i16 trunc (i32 select (i1 icmp eq (i32* getelementptr inbounds ([1 x i32]* @a, i32 0, i32 0), i32* @d), i32 0, i32 1) to i16), i16 42) +} |