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Auto merge of #40133 - arielb1:operand-lifetimes, r=eddyb

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[MIR] improve operand lifetimes

r? @eddyb
This commit is contained in:
bors 2017-03-03 13:12:08 +00:00
commit f0b514524f
16 changed files with 356 additions and 130 deletions
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8
src/test/codegen/lifetime_start_end.rs
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@ -11,11 +11,9 @@
// compile-flags: -O -C no-prepopulate-passes
#![crate_type = "lib"]
#![feature(rustc_attrs)]
// CHECK-LABEL: @test
#[no_mangle]
#[rustc_mir] // FIXME #27840 MIR has different codegen.
pub fn test() {
let a = 0;
&a; // keep variable in an alloca
@ -33,11 +31,11 @@ pub fn test() {
// CHECK: [[S__5:%[0-9]+]] = bitcast %"core::option::Option<i32>"* %_5 to i8*
// CHECK: call void @llvm.lifetime.start(i{{[0-9 ]+}}, i8* [[S__5]])
// CHECK: [[E__5:%[0-9]+]] = bitcast %"core::option::Option<i32>"* %_5 to i8*
// CHECK: call void @llvm.lifetime.end(i{{[0-9 ]+}}, i8* [[E__5]])
// CHECK: [[E_b:%[0-9]+]] = bitcast %"core::option::Option<i32>"** %b to i8*
// CHECK: call void @llvm.lifetime.end(i{{[0-9 ]+}}, i8* [[E_b]])
// CHECK: [[E__5:%[0-9]+]] = bitcast %"core::option::Option<i32>"* %_5 to i8*
// CHECK: call void @llvm.lifetime.end(i{{[0-9 ]+}}, i8* [[E__5]])
}
let c = 1;