test/Transforms/InstCombine/cast-malloc.ll


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

; test that casted mallocs get converted to malloc of the right type
; RUN: opt < %s -instcombine -S | \
; RUN:    grep bitcast | count 1

; The target datalayout is important for this test case. We have to tell 
; instcombine that the ABI alignment for a long is 4-bytes, not 8, otherwise
; it won't do the transform.
target datalayout = "e-i64:32:64"

define i32* @test(i32 %size) {
        %X = malloc i64, i32 %size              ; <i64*> [#uses=1]
        %ret = bitcast i64* %X to i32*          ; <i32*> [#uses=1]
        ret i32* %ret
}