[llvm-bugs] [Bug 38986] Poor code generation for masked scalar store

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38986

listmail at philipreames.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #4 from listmail at philipreames.com ---
Having said that... I went and wrote another handful of tests and hit another
problem.  Note that this is with a stale build so it's possible the fixes you
landed already got this.

declare void @llvm.masked.store.v1i32.p0v1i32 (<1 x i32>, <1 x i32>*, i32, <1 x
i1>)

define void @test(i1 %c, i32* %p, i32 %v) {
 %vc = insertelement <1 x i1> undef, i1 %c, i32 0
 %vp = bitcast i32* %p to <1 x i32>*
 %vvec = insertelement <1 x i32> undef, i32 %v, i32 0
 call void @llvm.masked.store.v1i32.p0v1i32 (<1 x i32> %vvec, <1 x i32>* %vp,
i32 4, <1 x i1> %vc)
 ret void
}

define void @test2(i1 %c, i32* %p, i32 %v) {
  br i1 %c, label %taken, label %untaken
taken:
  store i32 %v, i32* %p
  ret void
untaken:
  ret void
}

        .text
        .file   "<stdin>"
        .globl  test                    # -- Begin function test
        .p2align        4, 0x90
        .type   test, at function
test:                                   # @test
        .cfi_startproc
# %bb.0:
        testb   $1, %dil
        jne     .LBB0_1
# %bb.2:                                # %else
        retq # <<-- NOTE THE DUPLICATE RETURN
.LBB0_1:                                # %cond.store
        movl    %edx, (%rsi)
        retq
.Lfunc_end0:
        .size   test, .Lfunc_end0-test
        .cfi_endproc
                                        # -- End function
        .globl  test2                   # -- Begin function test2
        .p2align        4, 0x90
        .type   test2, at function
test2:                                  # @test2
        .cfi_startproc
# %bb.0:
        testb   $1, %dil
        je      .LBB1_2
# %bb.1:                                # %taken
        movl    %edx, (%rsi)
.LBB1_2:                                # %untaken
        retq
.Lfunc_end1:
        .size   test2, .Lfunc_end1-test2
        .cfi_endproc
                                        # -- End function

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