diff options
Diffstat (limited to 'test/Transforms/InstCombine/2006-12-05-fp-to-int-ext.ll')
-rw-r--r-- | test/Transforms/InstCombine/2006-12-05-fp-to-int-ext.ll | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/2006-12-05-fp-to-int-ext.ll b/test/Transforms/InstCombine/2006-12-05-fp-to-int-ext.ll new file mode 100644 index 000000000000..2c3313efa2a8 --- /dev/null +++ b/test/Transforms/InstCombine/2006-12-05-fp-to-int-ext.ll @@ -0,0 +1,12 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep zext + +; Never merge these two conversions, even though it's possible: this is +; significantly more expensive than the two conversions on some targets +; and it causes libgcc to be compile __fixunsdfdi into a recursive +; function. +define i64 @test(double %D) { + %A = fptoui double %D to i32 ; <i32> [#uses=1] + %B = zext i32 %A to i64 ; <i64> [#uses=1] + ret i64 %B +} + |