Dan Gohman | 1880092 | 2009-09-11 18:01:28 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -instcombine -S | grep zext |
Chris Lattner | 83830075 | 2006-12-05 23:43:20 +0000 | [diff] [blame] | 2 | |
| 3 | ; Never merge these two conversions, even though it's possible: this is |
| 4 | ; significantly more expensive than the two conversions on some targets |
| 5 | ; and it causes libgcc to be compile __fixunsdfdi into a recursive |
| 6 | ; function. |
Tanya Lattner | 5640bd1 | 2008-03-01 09:15:35 +0000 | [diff] [blame] | 7 | define i64 @test(double %D) { |
| 8 | %A = fptoui double %D to i32 ; <i32> [#uses=1] |
| 9 | %B = zext i32 %A to i64 ; <i64> [#uses=1] |
| 10 | ret i64 %B |
Chris Lattner | 83830075 | 2006-12-05 23:43:20 +0000 | [diff] [blame] | 11 | } |
Tanya Lattner | 5640bd1 | 2008-03-01 09:15:35 +0000 | [diff] [blame] | 12 | |