forked from OSchip/llvm-project
42 lines
1.5 KiB
LLVM
42 lines
1.5 KiB
LLVM
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck %s
|
|
|
|
; The branch instruction in LOOP49 has a uniform condition, but PHI instructions
|
|
; introduced by the structurizecfg pass previously caused a false divergence
|
|
; which ended up in an assertion (or incorrect code) because
|
|
; SIAnnotateControlFlow and structurizecfg had different ideas about which
|
|
; branches are uniform.
|
|
;
|
|
; CHECK-LABEL: {{^}}main:
|
|
; CHECK: ; %LOOP49
|
|
; CHECK: v_cmp_ne_i32_e32 vcc,
|
|
; CHECK: s_cbranch_vccnz
|
|
; CHECK: ; %ENDIF53
|
|
define amdgpu_vs float @main(i32 %in) {
|
|
main_body:
|
|
%cmp = mul i32 %in, 2
|
|
br label %LOOP
|
|
|
|
LOOP: ; preds = %ENDLOOP48, %main_body
|
|
%counter = phi i32 [ 0, %main_body ], [ %counter.next, %ENDLOOP48 ]
|
|
%v.LOOP = phi i32 [ 0, %main_body ], [ %v.ENDLOOP48, %ENDLOOP48 ]
|
|
%tmp7 = icmp slt i32 %cmp, %counter
|
|
br i1 %tmp7, label %IF, label %LOOP49
|
|
|
|
IF: ; preds = %LOOP
|
|
%r = bitcast i32 %v.LOOP to float
|
|
ret float %r
|
|
|
|
LOOP49: ; preds = %LOOP
|
|
%tmp8 = icmp ne i32 %counter, 0
|
|
br i1 %tmp8, label %ENDLOOP48, label %ENDIF53
|
|
|
|
ENDLOOP48: ; preds = %ENDIF53, %LOOP49
|
|
%v.ENDLOOP48 = phi i32 [ %v.LOOP, %LOOP49 ], [ %v.ENDIF53, %ENDIF53 ]
|
|
%counter.next = add i32 %counter, 1
|
|
br label %LOOP
|
|
|
|
ENDIF53: ; preds = %LOOP49
|
|
%v.ENDIF53 = add i32 %v.LOOP, %counter
|
|
br label %ENDLOOP48
|
|
}
|